Engine-starter.



V. BENDIX.

ENGINE STARTER.

APPLICATION FILED APR. 10. 1916.

Patented Jan. 16, 1917.

VINCENT IBENDIX, OF CHICAGO, ILLINOIS.

ENGINE-STARTER.

Specification of Letters Patent. Patented J n. 16, 1917 Application filed April 10, 1916. Serial N 0. 90,088.

To all whom it may concern:

Be it known that I, VINCENT BENDIX, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Engine-Starters, of which the following is a specification.

My invention relates to that type of engine starter and to the transmission or drive portion thereof as exemplified in patents heretofore issued to me, for instance, Patent No. 1,172,864, issued on February 22, 1916, which starter is characterized by. a prime mover such as an electric motor and a transmission or drive for transmitting the power or motion of the motor by means of a screw shaft device and pinion to a member of the engine, such as the fly-wheel thereof. This transmission or drive comprises a screw shaft operated either directly or indirectly by the electric motor and a pinion screwthreaded on such shaft for longitudinal movement thereon and rotary movement therewith. The pinion is providedwith a weight which ismade separate from the pinion and secured thereto.

The object of my invention is to produce a simple and e'liicient construction of pinion and weight, and more particularly to provide for the secure and effectual fastening of the weight to the pinion. 1

Another object of my invention is vide a simple and efficient form of weight for the pinion, the same com'prising essentially a disk for attachment to the pinion and a flange portion forming the Weight for over-balancing the disk and thereby overbalancing the entire pinion structure when the disk is attached thereto. J

In the drawing, Figure 1 is an elevation partlyin section of a pinion and its weight looking at the pinion end thereof; Fig. 2 a

similar view but lookingat the weight. end

thereof; Fig. 3 a section on the line 3-3of Fig. 2 and Fig. 4 an elevation of a pinion and weight showing a modified form of fastening means.

Referring to the embodiment of my invention as shown in Figs. 1, 2 and 3, the

pinion. has its teeth 1 milled all the way across, that is, to the full extent of the body of the pinion longitudinally. These teeth, however, at the end at which the weight is attached are partially cut away to form right angle recesses 1 to receive the disk portion 2 of the weight 2. Thls disk has to proa central opening 2 of a diameter to rather snugly fit said recesses 1 formed on the weight end of the pinion teeth. When the disk is applied to the pinion it will fit accurately in these recesses, as clearly shown in Fig. 3, in order to prevent the detachment of the parts. The outer edges of each of the reduced portions of the teeth 1 are rolled or headed over upon the disk, as shown at 1. It is desirable to make the pinion itself as light in weight and as small in diameter as possible, for which reason the disk 2 is employed, thereby providing additional inertia, which in connection with the overbalance weight 2, gives the proper action to the pinion.

In F ig.4 I have shown a modified form of construction, according to which the central opening 2 of the disk, instead of being circular as in the other construction is made with a toothed formation to correspond with the reduced toothed formation of the pinion, with the result that when the disk is applied to thepinion it will be interlocked therewith owing to the fact that the inwardly projecting teeth in the opening of the disk will fit in the grooves or spaces of the teeth 1. In this construction the'outer edges of the reduced portions of the teeth 1 are rolled or headed over in the manner shown in Fig. 3.

I claim:

1. A pinion for the transmission of an engine starter comprising a pinion having its teeth at one end cut away, a disk fitted to the pinion at such cut-away portion, and means for securing the disk to the pinion.

2. A weighted pinionfor the transmission oif an engine starter comprising a pinion having its teeth at one end cut away, a weighted disk fitted to the pinion at such cut-away portion, a portion of the material of the pinion being rolled over against the disk to prevent the removal of thelatter.

3. A weighted pinion for the transmission of an engine starter comprising a pinion having its teeth at one end partially cut away, and a weighted disk having a central opening fitting upon the pinion at its cut away portion, and means for preventing the removal of the disk from the pinion.

' 4. A weighted pinion for the transmission of an engine starter comprising a pinion having-its teeth atone end partially cut away, and a weighted disk having a central opening fitting upon the pinion at its cut,

away portion, a portion of the material of the pinion being rolled over against the disk to prevent the removal of the latter.

5. A Weighted pinion for the transmission of an engine starter comprising a pinion having its teeth at one end out way to form right-angled recesses, a Weighted disk having a central opening and adapted to fit in 'said recesses, and means for preventing the removal of the disk from the pinion.

6. A Weighted pinion for thetransmission of an engine starter comprising a pinion having its teeth at one end partially cut away and a weighted disk having a toothed central opening of the same formation as such cutaway end of the pinion and adapted to interlock therewith.

7. A weight for a pinion of an engine S. E. HIBBEN, ROBERT DOBBERMAN. 

